EP0364419A1 - Cable entry - Google Patents

Cable entry Download PDF

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Publication number
EP0364419A1
EP0364419A1 EP89850311A EP89850311A EP0364419A1 EP 0364419 A1 EP0364419 A1 EP 0364419A1 EP 89850311 A EP89850311 A EP 89850311A EP 89850311 A EP89850311 A EP 89850311A EP 0364419 A1 EP0364419 A1 EP 0364419A1
Authority
EP
European Patent Office
Prior art keywords
cable
shell
sockets
collar
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89850311A
Other languages
German (de)
French (fr)
Other versions
EP0364419B1 (en
Inventor
Helge Lindroos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xylem Water Solutions AB
Original Assignee
Flygt AB
ITT Flygt AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flygt AB, ITT Flygt AB filed Critical Flygt AB
Priority to AT89850311T priority Critical patent/ATE89957T1/en
Publication of EP0364419A1 publication Critical patent/EP0364419A1/en
Application granted granted Critical
Publication of EP0364419B1 publication Critical patent/EP0364419B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132—Submersible electric motors

Definitions

  • Subject invention concerns a cable entry for connection of an electric power cable to a submersible machine such as an electrically driven pump or a turbine generator.
  • Submersible machines of the above mentioned type comprise a sealed motor or a generator to which electric power is fed, alternatively is taken out, via a cable.
  • a sealed motor or a generator to which electric power is fed, alternatively is taken out, via a cable.
  • a main disadvantage with this design is primarily that the clamping device does not apply a symmetric squeeze over the cable which means risks for damages on the cable.
  • Another way to obtain a completely water tight cable entry is to embed the electric conductors in a filling of an insulating material.
  • An example of such a solution is shown in GM 82187630. This design obtains a good sealing but is relatively expensive and above all, it is very difficult to obtain out in the field if a repair is needed.
  • the purpose of this invention is to solve the problems men­tioned above by designing a cable entry which meets the re­quirements for sealing as well as for clamping.
  • FIG. 1 stands for a cable, 2 a wall or a shell around an electric motor or the like, 3 a cable collar, 4 screws, 5 and 6 elastic sockets, 7 pressure discs, 8 an inter­mediate ring a 9 an O-ring.
  • the wall or the shell 2 and the collar 3 are provided with enlarged holes for the cable 1, said holes having diameters considerably bigger than that of the cable.
  • the elastic sockets 5 and 6 are positioned whithin said enlarged holes, one in the shell and one in the collar 3.
  • the outer diamters of said sockets correspond with the diameters of the enlarges holes in the shell and the collar, while the inner diameters of said sockets 5 and 6 somewhat exceed the diamter of the cable.
  • the lengths of the sockets 5 and 6 and the ring 8 as well as the lengths of the enlarged holes in the shell 2 and the collar 3 are so dimensioned, that the collar will take a position at a certain distance from the shell 2 at the initial step of the mounting, when the sockets 5 and 6 take their initial, rest, positions.
  • the sockets 5 and 6 will be compressed axially and expanded radially. In this way they will obtain a grip around the cable and fix and seal it in the shell as well as in the collar. By choosing the lengths of the sockets and the holes, a suitably firm grip around the cable will be obtained when the collar has reached its final position in contact with the shell.
  • the ring 8 of a non-elastic material is necessary to prevent the sockets from expanding into the partition betwen the shell and the collar during mounting.
  • an O-ring seal 9 which effectively prevents any leakage between the sockets in case any of them should be damaged.
  • Pressue discs 7 are arranged between the end surfaces of the sockets 5, 6 and the ringformed surfaces forming the transi­tions from the enlarged holes in the shell 2 and the collar 3 resp. These discs 7, as well as the sockets 5, 6, are avail­able in different dimensions, which means that the same parts 2 and 3 may be used for several different cable diameters.
  • the grip around the cable is symmetric, which means that the risk for damaging the cable is considerably decreased.
  • the grip can be exactly predetermined by dimensio­ning of the sockets etc as the collar is always fastened tight to the shell.
  • the torque is depen­ding on the man mounting the device which means risk for too tight as well as too soft grips.
  • the two separate sockets 5 and 6 mean double security which gives a sufficient sealing and clamping, even if one of them should be damaged.
  • the invention means a considerable cost reduction as several cable dimensions may be mounted only by changing the non-­expensive sockets 5, 6 and pressure discs 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cable Accessories (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Flexible Shafts (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)
  • Motor Or Generator Frames (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

The invention concerns a cable entry for connection of an electric cable to a submersible machine, such as an electrically driven pump or a turbine generator.
The device comprises two sockets (5) and (6) of an elastic material which during mounting are compressed axially thus expanding radially securing and sealing the cable (1).

Description

  • Subject invention concerns a cable entry for connection of an electric power cable to a submersible machine such as an electrically driven pump or a turbine generator.
  • Submersible machines of the above mentioned type comprise a sealed motor or a generator to which electric power is fed, alternatively is taken out, via a cable. As no liquid is allowed to enter the machine there are great demands on the cable entry, expecially as the cable is often subject to repeated bendings and stretchings within the area of the entry. As the stretch load in the cable may be significant, the grip around the cable must be firm, however, without causing damages because of squeezing.
  • The sealing and the hold of the cable has normally up to now been carried out by help of a socket of an elastic material such as rubber and a metallic clamping device. An example of such a design is shown in the Swedish Patent No 326 234.
  • A main disadvantage with this design is primarily that the clamping device does not apply a symmetric squeeze over the cable which means risks for damages on the cable.
  • Another way to obtain a completely water tight cable entry is to embed the electric conductors in a filling of an insulating material. An example of such a solution is shown in GM 82187630. This design obtains a good sealing but is relatively expensive and above all, it is very difficult to obtain out in the field if a repair is needed.
  • The purpose of this invention is to solve the problems men­tioned above by designing a cable entry which meets the re­quirements for sealing as well as for clamping.
  • The invention is dislosed below with reference to the enclosed drawing.
  • In the drawing 1 stands for a cable, 2 a wall or a shell around an electric motor or the like, 3 a cable collar, 4 screws, 5 and 6 elastic sockets, 7 pressure discs, 8 an inter­mediate ring a 9 an O-ring.
  • The wall or the shell 2 and the collar 3 are provided with enlarged holes for the cable 1, said holes having diameters considerably bigger than that of the cable. When mounting the cable, the elastic sockets 5 and 6 are positioned whithin said enlarged holes, one in the shell and one in the collar 3. The outer diamters of said sockets correspond with the diameters of the enlarges holes in the shell and the collar, while the inner diameters of said sockets 5 and 6 somewhat exceed the diamter of the cable. Between the sockets 5 and 6 a ring of a rigid material, having an outer diamter somewhat smaller than that of the sockets, is arranged. After that, the cable is brought in through the sockets.
  • The lengths of the sockets 5 and 6 and the ring 8 as well as the lengths of the enlarged holes in the shell 2 and the collar 3 are so dimensioned, that the collar will take a position at a certain distance from the shell 2 at the initial step of the mounting, when the sockets 5 and 6 take their initial, rest, positions.
  • When the cable 1 has been brought sufficiantly into the machi­ne, screws 4 are put into holes in the collar 3 and are scre­wed into holes in the shell 2. The collar is then pressed towards the shell and the screws are so fastened, that the collar finally will come into contact with the shell.
  • Because of the movement of the collar, the sockets 5 and 6 will be compressed axially and expanded radially. In this way they will obtain a grip around the cable and fix and seal it in the shell as well as in the collar. By choosing the lengths of the sockets and the holes, a suitably firm grip around the cable will be obtained when the collar has reached its final position in contact with the shell.
  • The ring 8 of a non-elastic material is necessary to prevent the sockets from expanding into the partition betwen the shell and the collar during mounting.
  • In the partition there is arranged an O-ring seal 9, which effectively prevents any leakage between the sockets in case any of them should be damaged.
  • Pressue discs 7 are arranged between the end surfaces of the sockets 5, 6 and the ringformed surfaces forming the transi­tions from the enlarged holes in the shell 2 and the collar 3 resp. These discs 7, as well as the sockets 5, 6, are avail­able in different dimensions, which means that the same parts 2 and 3 may be used for several different cable diameters.
  • According to the invention a lot of advantages are obtained as compared with earlier used devices for sealing and clamping of cable entries. The grip around the cable is symmetric, which means that the risk for damaging the cable is considerably decreased. The grip can be exactly predetermined by dimensio­ning of the sockets etc as the collar is always fastened tight to the shell. In the known cable entries the torque is depen­ding on the man mounting the device which means risk for too tight as well as too soft grips. The two separate sockets 5 and 6 mean double security which gives a sufficient sealing and clamping, even if one of them should be damaged. Finally the invention means a considerable cost reduction as several cable dimensions may be mounted only by changing the non-­expensive sockets 5, 6 and pressure discs 7.

Claims (6)

1 A device for securing and sealing of a cable entry in a submersible machine, such as an electrically driven pump, a turbine etc, the machine being surrounded by a water tight shell and the cable, adjacent the shell, being surrounded by a collar of a rigid material, which collar is secured to the shell by screws, characterized in that the clamping/sealing comprises two sockets (5) and (6) of an elastic material surrounding the cable (1), one of them mounted in the shell (2) and the other in the collar (3) and a ring (8) of a rigid material arranged between the two sockets, the collar (3) during mounting being moved towards and into contact with the shell (2), there­by causing the sockets (5) and (6) to be compressed axially and expanded radially so that the cable (1) is secured and sealed.
2 A device according to claim 1, characterized in that the ring (8) is arranged in front of the partition between the shell (2) and the collar (3).
3 A device according to claim 1, characterized in that the sockets (5) and (6) in their rest positions have inner diameters which are somewhat bigger than the diameter of the cable (1).
4 A device according to claim 3, characterized in that the sockets (5) and (6) when compressed, have inner diame­ters, which are smaller than the nominal diameter of the cable (1).
5 A device according to claim 1, characterized in that an o-ring (9) is arranged in the partition between the collar (3) and the shell (2).
6 A device according to claim 2, characterized in that pressure discs (7) are arranged between the sockets (5), (6) and their contact surfaces in the shell (2) and collar (3) resp.
EP89850311A 1988-10-10 1989-09-22 Cable entry Expired - Lifetime EP0364419B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89850311T ATE89957T1 (en) 1988-10-10 1989-09-22 CABLE ENTRY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8803579A SE462249B (en) 1988-10-10 1988-10-10 DEVICE FOR LOADING AND SEALING OF A CABLE PIPE
SE8803579 1988-10-10

Publications (2)

Publication Number Publication Date
EP0364419A1 true EP0364419A1 (en) 1990-04-18
EP0364419B1 EP0364419B1 (en) 1993-05-26

Family

ID=20373564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89850311A Expired - Lifetime EP0364419B1 (en) 1988-10-10 1989-09-22 Cable entry

Country Status (8)

Country Link
US (1) US4965409A (en)
EP (1) EP0364419B1 (en)
JP (1) JPH02253059A (en)
AT (1) ATE89957T1 (en)
CA (1) CA1324643C (en)
DE (1) DE68906754T2 (en)
DK (1) DK166849B1 (en)
SE (1) SE462249B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778796A1 (en) * 1998-05-14 1999-11-19 Stober Antriebstechnik Gmbh & Electric motor connection terminal housing
GB2431962A (en) * 2005-11-02 2007-05-09 Keith Pengelly A cable locking device
CN102842880A (en) * 2012-09-07 2012-12-26 江苏中兴水务有限公司 Quadruple sealing structure of cable of submersible electric pump
CN103036187A (en) * 2011-09-30 2013-04-10 中国石油化工股份有限公司 Underwater circuit connector
CN105932819A (en) * 2016-06-29 2016-09-07 佛山市南海区绿智电机设备有限公司 Waterproof sealing device for motor casing outlet
CN109450148A (en) * 2018-12-09 2019-03-08 无锡市东舟船舶设备股份有限公司 A kind of high pressure resistant small micro machine

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5772218A (en) * 1993-03-12 1998-06-30 Warman International Limited Uniform compression gland seal assembly
TW330658U (en) * 1993-03-12 1998-04-21 Warman Int Ltd Gland seal assembly housing
US5920035A (en) * 1997-03-12 1999-07-06 Atp International Ltd. High pressure seal
CN1297764C (en) * 2001-07-17 2007-01-31 张治屏 Water-tight shield ring for hole
US6676447B1 (en) 2002-07-18 2004-01-13 Baker Hughes Incorporated Pothead connector with elastomeric sealing washer
US7071588B1 (en) 2004-05-20 2006-07-04 Yeomans Chicago Corporation Pump motor penetration assembly
US7896712B2 (en) 2005-12-22 2011-03-01 Tensolite, Llc Integral bonding attachment
US7241185B1 (en) * 2005-12-22 2007-07-10 Tensolite Company Integral bonding attachment
CA2838774C (en) * 2011-06-09 2016-08-02 Abb Technology Ag Strengthening element for a mounting flange of a hollow cylindrical insulator housing
JP5942513B2 (en) * 2012-03-21 2016-06-29 日立金属株式会社 Electrical connection structure, sealing device, and inverter-integrated motor
CN103453719A (en) * 2012-05-31 2013-12-18 鸿富锦精密工业（深圳）有限公司 Water tank
JP5845224B2 (en) * 2013-09-26 2016-01-20 ファナック株式会社 Stator having bracket, electric motor having stator, and method of manufacturing electric motor
CN104092174A (en) * 2014-06-26 2014-10-08 徐州禹神机电有限公司 Cable sealing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE169859C1 (en) *

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US223835A (en) * 1880-01-27 Pipe-coupling
DE944616C (en) * 1936-12-28 1956-06-21 Hoppmann & Mulsow Pressure nipple for waterproof cable glands
US2260542A (en) * 1940-06-24 1941-10-28 William D Shaffer High pressure flange packing
DE912883C (en) * 1952-06-29 1954-06-03 Ver Armaturen Ges M B H Stuffing box packing for shut-off devices
US2673301A (en) * 1952-08-14 1954-03-23 Eustace S Dunn Fluid tight stator, particularly for electric motors
US2703371A (en) * 1953-12-30 1955-03-01 Gen Electric Submersible dynamoelectric machine
GB954809A (en) * 1961-08-08 1964-04-08 George Montague Pratley A flame-proof cable gland
SE326234B (en) * 1965-11-04 1970-07-20 E Vejde
JPS593582B2 (en) * 1979-04-10 1984-01-25 邦夫 鷲尾 Method for producing circular knitted fabric with heterogeneous systems arranged on the inner and outer surfaces
DE3010829A1 (en) * 1980-03-21 1981-10-01 Achim Ing.(Grad.) 3006 Burgwedel Daume Stuffing box seal with rings of different thickness - which are subjected to equal pressure and separated by externally stepped distance bush

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE169859C1 (en) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778796A1 (en) * 1998-05-14 1999-11-19 Stober Antriebstechnik Gmbh & Electric motor connection terminal housing
GB2340673A (en) * 1998-05-14 2000-02-23 Stober Antriebstechnik Gmbh & Sealing of motor terminal box
GB2340673B (en) * 1998-05-14 2002-04-17 Stober Antriebstechnik Gmbh & Motor terminal box
GB2431962A (en) * 2005-11-02 2007-05-09 Keith Pengelly A cable locking device
CN103036187A (en) * 2011-09-30 2013-04-10 中国石油化工股份有限公司 Underwater circuit connector
CN102842880A (en) * 2012-09-07 2012-12-26 江苏中兴水务有限公司 Quadruple sealing structure of cable of submersible electric pump
CN105932819A (en) * 2016-06-29 2016-09-07 佛山市南海区绿智电机设备有限公司 Waterproof sealing device for motor casing outlet
CN109450148A (en) * 2018-12-09 2019-03-08 无锡市东舟船舶设备股份有限公司 A kind of high pressure resistant small micro machine

Also Published As

Publication number Publication date
DK498089D0 (en) 1989-10-09
DK498089A (en) 1990-04-11
ATE89957T1 (en) 1993-06-15
EP0364419B1 (en) 1993-05-26
JPH02253059A (en) 1990-10-11
US4965409A (en) 1990-10-23
SE8803579L (en) 1990-04-11
DK166849B1 (en) 1993-07-19
DE68906754T2 (en) 1993-12-09
CA1324643C (en) 1993-11-23
SE8803579D0 (en) 1988-10-10
DE68906754D1 (en) 1993-07-01
SE462249B (en) 1990-05-21

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